Atomic Mass Unit to Carat Converter
Convert Atomic Mass Unit (u) to Carat (ct) instantly. 1 u = 8.302695e-24 ct.
Mass Converter
26 units available
1 u = 8.302695e-24 ct
Formula:
ct = u × 8.302695e-24With your value: 1 u = 8.302695e-24 ct
How big is that?
Everyday references on a logarithmic scale, all expressed in atomic mass unit so you can sanity-check the result.
Other Atomic Mass Unit to Carat conversions
Atomic Mass Unit to Carat Conversion Table
| Atomic Mass Unit (u) | Carat (ct) |
|---|---|
| 0.5 | 4.151348e-24 |
| 1 | 8.302695e-24 |
| 2 | 1.660539e-23 |
| 5 | 4.151348e-23 |
| 10 | 8.302695e-23 |
| 15 | 1.245404e-22 |
| 20 | 1.660539e-22 |
| 25 | 2.075674e-22 |
| 50 | 4.151348e-22 |
| 100 | 8.302695e-22 |
| 250 | 2.075674e-21 |
| 500 | 4.151348e-21 |
| 1000 | 8.302695e-21 |
Carat to Atomic Mass Unit Conversion Table
| Carat (ct) | Atomic Mass Unit (u) |
|---|---|
| 0.5 | 6.022141e+22 |
| 1 | 1.204428e+23 |
| 2 | 2.408856e+23 |
| 5 | 6.022141e+23 |
| 10 | 1.204428e+24 |
| 15 | 1.806642e+24 |
| 20 | 2.408856e+24 |
| 25 | 3.011070e+24 |
| 50 | 6.022141e+24 |
| 100 | 1.204428e+25 |
| 250 | 3.011070e+25 |
| 500 | 6.022141e+25 |
| 1000 | 1.204428e+26 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Atomic Mass Unit (u)
Mass
The unified atomic mass unit is 1/12 the mass of a free carbon-12 atom: 1.660 539 068 92(52) × 10⁻²⁷ kg.
Experimentally determined; the last digits carry the CODATA 2022 uncertainty.
Source: CODATA Internationally Recommended Values of the Fundamental Physical Constants (2022 adjustment)
CODATA / NIST · Reviewed 2026-07-01
Carat (ct)
Mass
The metric carat is exactly 200 mg, agreed internationally in 1907.
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Atomic Mass Unit to Carat
To convert from Atomic Mass Unit (u) to Carat (ct), multiply the value by 8.302695e-24.
Formula: ct = u × 8.302695e-24
Reverse: u = ct × 1.204428e+23
Step-by-Step Example
- Start with your value in Atomic Mass Unit. For example: 5 u
- Multiply by the conversion factor: 5 x 8.302695e-24
- The result is: 4.151348e-23 ct
About Atomic Mass Unit
The unified atomic mass unit (dalton) is 1/12 the mass of a carbon-12 atom, about 1.66054×10⁻²⁷ kg.
Common uses: chemistry, mass spectrometry, molecular biology.
About Carat
The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
Fun Fact: The word "carat" comes from the carob seed, which was used as a balance weight in ancient gem trading.
Common uses: gemstones, diamonds, jewelry.
Frequently Asked Questions
How many Carat are in 1 Atomic Mass Unit?
There are exactly 8.302695e-24 Carat in 1 Atomic Mass Unit. This means the conversion factor from Atomic Mass Unit to Carat is 8.302695e-24.
What is the formula to convert Atomic Mass Unit to Carat?
The formula to convert Atomic Mass Unit to Carat is: ct = u × 8.302695e-24. For example, to convert 10 Atomic Mass Unit to Carat, you would multiply 10 by 8.302695e-24.
What is a Atomic Mass Unit?
The unified atomic mass unit (dalton) is 1/12 the mass of a carbon-12 atom, about 1.66054×10⁻²⁷ kg.
What is a Carat?
The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
What are the common uses of Atomic Mass Unit?
The Atomic Mass Unit is commonly used in chemistry, mass spectrometry, molecular biology.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Atomic Mass Unit to Carat converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/atomic_mass_unit-to-carat